Hello,

JoSAA releases opening and closing ranks during each round of counselling, so admission occurs based on this. JoSAA announces category wise ranks. If you should get reservation for SC, then should bring the authorized SC certificate with you during counselling. For NITs you can apply for Home State (HS) quota also.

Dear aspirant, 

I'm providing you the link in which you will get each and every information regarding the previous year cutoff or opening and closing rank of various Nit's for all branches. 

Just go through this link and revert back if you still have doubts. 

https://www.google.com/amp/s/engineering.careers360.com/articles/nits-cutoff-for-top-btech-branches/amp

All the best for your next journey..!!